Patent US4938193A successfully refreshed from Google Patents.
Patent US3842036A successfully refreshed from Google Patents.
US3842036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
B-staged polyurethane-isocyanurates from alkylene oxide condensate of novolak resins
Assignee: Union Carbide Corp
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Filing: 1973-01-31
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Granted: 1974-10-15
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Expires: 1993-01-31
Abstract
Abstract 1. A NORMALLY SOLID, FUSIBLE COMPOSITION CAPABLE OF BEING TRANSFORMED INTO A THERMOSET COMPOSITON BY SUBJECTING SAID FUSIBLE COMPOSITION TO HEAT, WHEREIN SAID FUSIBLE COMPOSITION COMPRISES THE REACTION PRODUCT OF (A) AN ALKYLENE OXIDE CONDENSATE OF A NOVOLAK, (B) A STOICHIOMETRIC EXCESS OF AN ORGANIC POLYISOCYANATE, AND (C) A CATALYTICALLY EFFECTIVE QUANTITY OF A CATALYST FOR PROMOTING THE FORMATION OF ISOCYANURATE FROM ISOCYANATE, WHEREIN THE REACTION IS INTERRUPTED BY COOLING BEFORE REACHING THERMOSET STAGE.
Inventors
- 👤 S Chow
- 👤 M Matzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/16; C08G18/22; C08G18/225; C08G18/28; C08G18/40; C08G18/54; C08G18/546; C08K; C08K7/00; C08K7/02; C08G2115/00; C08G2115/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A NORMALLY SOLID, FUSIBLE COMPOSITION CAPABLE OF BEING TRANSFORMED INTO A THERMOSET COMPOSITON BY SUBJECTING SAID FUSIBLE COMPOSITION TO HEAT, WHEREIN SAID FUSIBLE COMPOSITION COMPRISES THE REACTION PRODUCT OF (A) AN ALKYLENE OXIDE CONDENSATE OF A NOVOLAK, (B) A STOICHIOMETRIC EXCESS OF AN ORGANIC POLYISOCYANATE, AND (C) A CATALYTICALLY EFFECTIVE QUANTITY OF A CATALYST FOR PROMOTING THE FORMATION OF ISOCYANURATE FROM ISOCYANATE, WHEREIN THE REACTION IS INTERRUPTED BY COOLING BEFORE REACHING THERMOSET STAGE.
Claim 2
Dependent Claim
73 words
A NORMALLY SOLID, FUSIBLE COMPOSITION CAPABLE OF BEING TRANSFORMED INTO A THERMOSET COMPOSITON BY SUBJECTING SAID FUSIBLE COMPOSITION TO HEAT, WHEREIN SAID FUSIBLE COMPOSITION COMPRISES THE REACTION PRODUCT OF (A) AN ALKYLENE OXIDE CONDENSATE OF A NOVOLAK, (B) A STOICHIOMETRIC EXCESS OF AN ORGANIC POLYISOCYANATE, AND (C) A CATALYTICALLY EFFECTIVE QUANTITY OF A CATALYST FOR PROMOTING THE FORMATION OF ISOCYANURATE FROM ISOCYANATE, WHEREIN THE REACTION IS INTERRUPTED BY COOLING BEFORE REACHING THERMOSET STAGE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |